1) Cookie and Gila 2) Fiends 3) Frightening creatures 4) Frightening things 5) Gila and others 6) Godzilla and mothra 7) Griffin, centaur, etc 8) Horror movie staples 9) Horror-film personnel 10) Sci-fi staples 11) Scream elicitors 12) Some have more than one head Found on https://www.crosswordclues.com/clue/monsters
A foetus or infant with such pronounced developmental anomalies as to be grotesque and usually nonviable. ... (12 Dec 1998) ... Found on http://www.encyclo.co.uk/local/20973